So EXPLANATION OF TERMS 



Median area: of wings in Orthoptcro, lies between the radial and ulnar veins, 

 radius and media (Comst.) : of meta-thorax of Hymcnoptera, is the middle 

 of the dorsum, divided into three spaces yr cells; ist or basal area, 2d or 

 upper median or areola ; 3d or apical or petiolar area. 



Median carina: Ortlwptera ; of head, is usually applied to a median dorsal 

 carina, but has been also used for that which extends down the middle of 

 front from the fastigium, and then = frontal costa : of prothorax, extends 

 along the middle of pronotum. 



Median cell: in Lepidoptera, is the closed area formed by a line extending 

 from the end of subcostal to the end of the median veins, = radial (Comst.) : 

 in Hymcnoptera, ist median (Pack.), ^ medial (Comst.) ; 2d median (Pack.), 

 = medial 4 (Comst.) ; 3d median (Pack.), = medial 2 (Comst.) ; 4th median 

 (Pack.), ^ medial i (Comst.). 



Median cross-veins: in Odonata ; are those which cross median space. 



Median foveola: in Ortlwptera; the foveate depression of the vertex between 

 the eyes : ;= central foveola. 



Median forks: in Orthoptera, refers to the forks of the median vein. 



Median furrow: lies between radius and media: in some Heteroptera, sepa- 

 rates the embolium from the remainder of the corium. 



Median lines: on the primaries of many moths; the first or t. a., crosses 

 about one-third from base ; the second or t. p., crosses beyond the outer 

 third and is usually sinuate. 



Median lobe: of labium in Odonata, is the partly divided glossa or ligula ;' 

 ]irobal)ly corresponds to united glossa and paraglossse (Butler). 



Median longitudinal carinae: on the metanotum of Hymenoptera, extend one 

 on each side of the middle. • 



Median nervules: in Lepidoptera (Holland); ist = cubitus 2 (Comst.); 2d = 

 cubitus I (Comst.); 3d =: media 3 (Comst.). 



Median notch: in Coccidw, a notch in the edge of the pygidium, at the posterior 

 extremity of the body. 



Median plate: in Hymenoptera sessiliventres, is the dorsal plate connecting 

 the thora.x and abdomen. 



Median sector: in OrfoHa/a, = media 3 (Comst.). 



Median segment: applied to the basal segment of the abdomen when it forms 

 part of the metathorax : see propodeum. 



Median shade or line: in Lepidoptera, crosses at or about middle of wings. 



Median space: in Lepidoptera, is the area between the median lines: in 

 Odonata, the cubital cell (Comst.) ; the space at base between submedian 

 (radius) and postcosta (ist anal) : by Selys in 1896 and later used in the 

 sense of medial cell of Comst. 



Median vein: in Odonata and Lepidoptera, = radius (Comst.) : in Lepidoptera, 

 it runs from base to about middle, nearly through centre, and is four or five 

 branched : in Hymenoptera, it is the 3d from costal margin. 



Mediastinal: relating to the longitudinal median line or area. 



Mediastinal area: in Orthoptera, the area between median or mediastinal 

 vein and the costal or front margin : = marginal area. 



Mediastinal vein: in Orthoptera and Diptcra, = subcosta (Comst.) : also, in 

 Diptcra, ^ auxiliary vein (Meigen). 



